If you have a trouble changing the language on Chromebook, do this process.
1. First at the bottom left, click the circle
2. Then, click the Rotary Icon that says "Configuración (Settings)".
3. Then Click "Configuración avanzada = advance setting"
4. Then click the Icon that looks like the World Globe that says " Idiomas y métodos de introducción de texto" (Language and text introduction methods).
n5. Next, click the small triangle to change the Idioma (language) from español (Spanish) to English. You have to scroll down to find "English".
6. One last step is that you need to click "Cambiar (change)" in blue box. After you did that, Chromebook will automatically re-boot with English.